// detectContent downloads a layer's archive and extracts its Namespace and Features.
func detectContent(name, path, imageFormat string, parent *database.Layer) (namespace *database.Namespace, features []database.FeatureVersion, err error) {
data, err := detectors.DetectData(path, imageFormat, append(detectors.GetRequiredFilesFeatures(),
detectors.GetRequiredFilesNamespace()...), maxFileSize)
if err != nil {
log.Errorf("layer %s: failed to extract data from %s: %s", name, utils.CleanURL(path), err)
return
}
// Detect namespace.
namespace, err = detectNamespace(data, parent)
if err != nil {
return
}
if namespace != nil {
log.Debugf("layer %s: Namespace is %s.", name, namespace.Name)
} else {
log.Debugf("layer %s: OS is unknown.", name)
}
// Detect features.
features, err = detectFeatures(name, data, namespace)
if err != nil {
return
}
// If there are no feature detected, use parent's features if possible.
// TODO(Quentin-M): We eventually want to give the choice to each detectors to use none/some
// parent's Features. It would be useful for detectors that can't find their entire result using
// one Layer.
if len(features) == 0 && parent != nil {
features = parent.Features
}
log.Debugf("layer %s: detected %d features", name, len(features))
return
}
// detectContent downloads a layer's archive and extracts its Namespace and Features.
func detectContent(imageFormat, name, path string, headers map[string]string, parent *database.Layer) (namespace *database.Namespace, featureVersions []database.FeatureVersion, err error) {
data, err := detectors.DetectData(imageFormat, path, headers, append(detectors.GetRequiredFilesFeatures(), detectors.GetRequiredFilesNamespace()...), maxFileSize)
if err != nil {
log.Errorf("layer %s: failed to extract data from %s: %s", name, utils.CleanURL(path), err)
return
}
// Detect namespace.
namespace = detectNamespace(name, data, parent)
// Detect features.
featureVersions, err = detectFeatureVersions(name, data, namespace, parent)
if err != nil {
return
}
if len(featureVersions) > 0 {
log.Debugf("layer %s: detected %d features", name, len(featureVersions))
}
return
}